Shoe.



l tion thereof to the shoe the same, destroying the parts. It has heretofore been proposed` UNITED STATES PATENT oEiIoE.A

. ADAM vH. PRENZEI.'7 or IIALIEAXQPENNSYLVANIA, AsSIGNOR To UNITED SHOE MACHINERY COMPANY, OE PATERSON, NEW JERSEY, A CORPORATION 0E NEW JERSEY.

SHOE.

Specification of Letters Patent. Patented Feb. 27, 191'?.

Application filed June 15, 1915. Serial No. 34,277.

To all whom t may concern: 1

Be it known that I, ADAM I-I; PRENZEL, a citizen of the United States, residing at Halifax, in the county of Dauphin and State of Pennsylvania, have invented certain new and useful Improvements in Shoes, of which the following is a specification, reference being had therein to the accompanying drawing.

The present invention 'relates to improvements in shoes and has for its object to` improve the construction of shoes as regards4 durability, comfort, cheapness, water proofing qualities and to prevent squeaking and drawing.

Present day' shoe constructions are unsatisfactory in that the filler structure between the inner and outerl soles does not retain its shape in use but shrinks, shifts, and bunches, with the result that the tread portion or support for the foot becomes uneven and irregular, ythe set and shape of the shoe is seriously aected, and a space is left between the parts permitting the entrance of moisture into the shoe. Furthermore, the materials of the ller injure the' leather, stitching, and adjacent fabric, and weaken or rot the connection between to provide' shoes with llers of a waxy nature, which are usually applied hot or require the presence of heat for the applicabottom. In practice these have been found wanting they injure the leather, stitching, and adjacent fabric of the' shoe, leaving a space between the parts' and that they are sensitive to heat and in use become soft and lose their shape. Shoes provided with fillers that contain rosin, resinous products, or vegetable oils, have a tendency to make shoes squeak, and the use of rosin and tarry and pitchy substances ycause the 4shoe to draw the feet.

Myinvention provides an improved shoe having set in soles and firmly cheap, elastic substance, water repellent, non-shrinkable, not permanently conformable to localized pressures, unafected by cold or any reasonable degree of heat, that. is not in any way harmful to the leather, stitching, and adjacent fabric, that will not' cause the Shoe to draw the feet, and that will shoe being materially increased.

construction commonly employed and illusin that A that they shrink between the inner and outer united therewith, a layer of A prevent squeaking, a non-shiftable, permanently even, resilient tread or support for the foot being thus afforded throughout the life of the shoe, and the water prooingv qualities, durability and pliability of the The invention will be understood from the4 following detailed description when considered in connection with the accompanying drawing, forming a part hereof, and wherein I have shown, by way of example, one embodiment of the invention, and have also illustrated certain defects of prior constructions. 7 In the drawings: Figure 1 is a bottom plan view of a shoe constructed in accordance with the present invention before the'outer sole has been secured in place;

Fig, 2 is a side elevation of the completed shoe with parts shown in section; Fig. 3 is a transverse section taken on the. line 3 3 of Fig. 2, the parts being shown on an enlarged scale; and

Fig. 4: is a transverse section of a shoe trating how the filler structure thereof shrinks, shifts, and bunches in use.

Referring to the drawings in detail, 1 designates the upper, 2 the inner sole, and 3 the outer sole. Set in the cavity of the insole between the soles and firmly united thereto, is a layer 4 -of elastic substance. The layer 4 consists of rubber solution, a large proportion of filling material such as comminuted cork or cork dust, a vulcanizing material such as sulfur, gutta percha 'and carbon tetrachlorid. A. coloring material, such as Venetian red or sun set lamp black may also be included. The rubber solution is formed by dissolving rubber in a volatile solvent, such as benzol, high grade -gasolene, vor naphtha, or like solvent. The rubber solution is placedvin a mixing machine with the comminuted filling material, the vulcanizing material, gutta percha, coloring matter and carbon tetrachlorid, and the Whole thoroughly mixed and kneaded together, the v carbon tetrachlorid being added before the completion of the mixing operation before removing the mixture from the mixing machine. The mixture thus produced is of a consistency capable of being molded or spread in a cold state by hand. When spread.

thereof, and the material intimately com-l bines and amalgamates with the surface of the insole, becoming closely and firmly united thereto. In practice the outer sole is not secured in place until some time after the layerhas become vulcanized, the outer sole being firmly secured to the under surface of the layer by any of the well known cements, appropriate for the purpose.

In the drawing, I have shown an inner sole known to the trade as the gem insole,

having a fabric reinforce provided with a` gutta percha backing by which the same is secured to theleather.

fabric reinforce is prepared for the reception of the layer 4 by providing the same with a coating of liquid glass or solution of silicate of soda. When the ordinary insole without the fabric reinforce is used the layer 4 is applied directly to the leather.

The cured layer in the shoe is elastic, water repellent, non-shrinkable, not permanently conformable to localized pressures, unaffected by cold or vany reasonable degree of heat, it is not in any way harmful tothe leather, stitching or ladjacent fabric, either in the'application thereof, or by the presence of injurious acids. A shoe is thus provided having a non-shiftable, permanently even, resilient tread or support for the foot throughout the life of the shoe, and thewater proofing qualities, durability and pliability'of the shoe are materially increased.'

The following is a formula which I prefer and which I have `found in practice to give particularly4 good results.

Cork dust 150 Gristly crape rubber 125 Sulfur a 12 Venetian red, or sun set lamp black Magnesia 3 Gasolene, or benzol 550 Gutta-percha 6 Carbon-tetrachlorid 16 The sulfur in the mixture is instrumentalv in effecting a cold cure and in this is assisted by the. magnesia. Thel tenacity and ability of the mixture to closely combineor the adjacent fabric, and is instrumentalv in protecting these parts. It serves to mainlVhen this type of insole is employed, the under surface of the pas tain the composition cool and counter-acts or prevents the natural tendency of the rubber in the composition to draw.

It will be remarked that the layer 4 in the completed shoe is characterized by the yabsence of all injurious acids, and will not harm the leather, stitching, or adjacent fabric. The shoe is free from materials that cause squeaking and will not draw the feet.

The shoe fillingsmaterial and the method of manufacturing` it are not claimed herein but form the subject-matter respectively of my co-pending applications Serial No. 33,264, filed June 10, 1915 and Serial No. 33,265, filed June 10, 1915.

What I claim is:

1. A shoe having an inner sole and an outer sole, and a composition layer in the cavity of the inner sole between the soles and firmly united thereto, said layer comprising a rubber solution, a filling material, and a vulcanizing material.

2. A shoe having an inner sole and an outerisole, and a composition layer in the cavity of the inner sole between the soles and lirmly united thereto, said layer comprising a rubber solution, a large proportion of filling material, a vulcanizing material, and carbon tetrachlorid.

' 3. A shoe having an inner sole and an outer sole, and a composition layer in the cavity of the inner sole between the soles and firmly united thereto, said layer com- 'outer sole, and a composition layer in the cavity. of the inner sole between the soles, saidlayer consisting of a rubber solutlon, a

'filling material, and a vulcanizing material, the layer of the material being united with and adhering to the surface of the inner sole. f

5. A shoe having an inner sole and an outer sole, and a composition layer in the cavity of the inner sole between the soles, said layer consisting of a rubber solutlon,

a filling material, and a vulcanizing material, the layer of material being united rwith and adhering to the surface of the inner sole, the undersurface of said layer being firmly connected to the outer sole.

6.v A shoe having an inner sole provided .e with a. fabric reinforce, an outer sole, a .composltion layer in the cavity ofthe inner sole between the soles and firmly united thereto, said layer comprising a rubber solutiOn, a filling material, and a vulcanizing material.

--7. A shoe having an inner sole provided with a fabric reinforce, an outer sole, a composition layer in the cavity of the inner sole between the soles and firmly united thereto,

said layer comprising a rubber solution, a filling material, a vulcanizing material, and carbon tetrachlorid.

8. A shoe having an inner sole provided with a fabric reinforce treated with soluble glass and cemented to the inner sole, an outer sole,and a composition layer in the cavity of the inner sole adhering to the fabric reinforce, said layer comprising a rubber solution, a filling material, and a vulcanizing material.

9. A shoe having an inner sole provided With a fabric reinforce treated with soluble glass and cemented to the inner Isole, an

outer sole and a composition layer in the 15 In testimony whereof I hereunto aizr my' 23 signature in the presence of two Witnesses.

ADAM H. PRENZEL,

Witnesses:

, JAS. E. NEITz,

G. W. SHULTz. 

